# Prompt Input

> A chat-style message composer textarea that auto-grows with content, sends on Enter (Shift+Enter for a new line), and swaps its send button for a stop button while a reply is streaming.

- Author: [tinkerers-labs](https://21st.dev/@tinkerers-labs)
- Library: @mischief
- License: MIT
- Tags: Chat, Textarea, AI, Prompt Input, Composer
- npm dependencies: lucide-react
- Live preview: https://21st.dev/@tinkerers-labs/components/prompt-input

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/tinkerers-labs/prompt-input?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/chat.md